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Sounds like a problem with the firmware in your router. Connectyour laptop directly to one of the four ports with a cat 5 cable. Turn of your wireless adapter and connect through the cable. Once your web browser is open, go to the URL http://192.168.1.1/. This will take you to a
pop up box which asks you to enter a user name and password. The default user name is admin and the default password is admin or password. From there You will be all the settings you can control. You are looking for the one to go on line and download the current firmware update. This will most likely solve your problem. If your router was working fine before do not tamper with any of the other options. If this does not clear up your problem you will probably need a new router. You can also try Pushing the tiny reset button on the back and running the setup disk that came with your router. If this fails you definitely need a new router.I hope this helps you. If you need more help feel free to contact me.George

Check to make sure that your router is not preventing the ps3 to connect. Typically caused by a firewall. You can type in your ps3's ip address on the routers permission tab to allow access to the internet.

Have you used the automatic settings for the two different connection types (wired and wireless)? You should only need to enter this information if you want to use DNS servers other than the ones provided by your ISP.

You can read more about internet connections on the PS3 with this link: Playstation.net

Can you give a little more information about your configuration? Are you connected at all? Do you know what is going on? Does your car have an automatic transmission? Do you have people hooked to the underground chopshop network? Have you relocated through a time portal? If you have, did you tell sony the problems people are having in the future with there PS3s? Did they commit you into an asylum? Did you call sonys tech support hotline? The number is 1-800-345-7669. I hope they can help you without having to unanswer your questions with more questions like these. If they don't know, I would suggest smashing it with a hammer.

OK IF YOU HAVE PS3, and you get the ERROR DNS while trying to login into PSN, all u need to do is, shutdown the console, then restart it by holding down the ON button on the PS# not the controller till you hear 2 beeps, then try to login again, should work.